Doubling-down on defense isn't going to win the War on Terror. Yesterday's scare in Times Square shows just how hopeless that strategy is -- if a cooler can be a threat, not even the NYPD will be able to stop them all. Yet the uptick in home-turf terror plots -- with last Saturday's bomb attempt just the latest -- has many screaming for us to fund an infinite range of new security steps. Faisal Shahzad hadn't even been charged before the rear-mirror scrutiny began. How did he slip past security and board a flight to Dubai before finally being nabbed,...